US8471399B2 - Floating wind power apparatus - Google Patents

Floating wind power apparatus Download PDF

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Publication number
US8471399B2
US8471399B2 US12/743,307 US74330708A US8471399B2 US 8471399 B2 US8471399 B2 US 8471399B2 US 74330708 A US74330708 A US 74330708A US 8471399 B2 US8471399 B2 US 8471399B2
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US
United States
Prior art keywords
rotor
rotors
floating unit
tower
towers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US12/743,307
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English (en)
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US20110006539A1 (en
Inventor
Marc Lefranc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windsea AS
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Windsea AS
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Publication date
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Assigned to WINDSEA AS reassignment WINDSEA AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEFRANC, MARC
Publication of US20110006539A1 publication Critical patent/US20110006539A1/en
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Publication of US8471399B2 publication Critical patent/US8471399B2/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/107—Semi-submersibles; Small waterline area multiple hull vessels and the like, e.g. SWATH
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
    • B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
    • F03D9/257—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor the wind motor being part of a wind farm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0091—Offshore structures for wind turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/93—Mounting on supporting structures or systems on a structure floating on a liquid surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/95—Mounting on supporting structures or systems offshore
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Definitions

  • the present invention concerns a floating wind power apparatus with a floating unit and at least three rotors supported in rotor housings or nacelles.
  • the rotor housings are placed on separate towers with a longitudinal central axes.
  • the towers are attached to the floating unit and to the rotor housings.
  • the floating unit can turn to direct the rotors in relation to the wind.
  • At least one of the rotors is a downwind rotor, and at least one rotor is an upwind rotor.
  • the towers are placed at an inclined angle in relation to the rotors.
  • Rotor, turbine, propeller or mill is in this connection meant to describe that part of the apparatus that is put in rotation by the wind and that transfers the energy of the wind to mechanical energy.
  • EP 1 106 825 it is shown a floating plant with three wind turbines are placed on a floating platform. The turbines are placed on vertical towers and all the turbines are upwind turbines.
  • NL 1008318C it is shown a floating wind turbine island with a number of upwind wind turbines placed on vertical towers at each corner of a floating unit.
  • DE 102004049506 it is shown a wind power plant with a number of rotors placed on a pontoon.
  • the rotors are mechanically connected to each other and drive a common generator.
  • the present invention concerns a floating wind power apparatus with a floating unit and at least three rotors supported in rotor housings, placed on separate towers.
  • the floating unit may be a “barge structure”, a truss work structure, or have a structure as a semi submersible platform.
  • the towers are typically made of steel, aluminum or a composite material.
  • the floating unit is typically made of steel, aluminum, a composite material or concrete.
  • the unit may be designed to take in ballast.
  • the towers have a longitudinal central axis and are attached to the floating unit and to the rotor housings.
  • the floating unit can be turned to direct the rotors in relation to the wind. Turn or yaw of the floating unit will yaw all the rotors simultaneously.
  • At least one rotor is a downwind rotor, and at least one rotor is an upwind rotor. This creates good balance and efficient use of the area the turbines act on.
  • At least one of the towers is placed at an inclined angle in relation to the rotors. This is particularly advantageous in relation to the downwind rotor, and allows the rotor housings to be placed “outside” the floating unit, such that the size of the floating unit can be reduced in relation to the effective area the rotors act on.
  • the other towers may however also be inclined, even if not all the towers need to be so. Solutions where the upwind rotors are placed on inclined towers and where the downwind rotor is placed on a straight tower are also possible. Solutions with one straight upwind tower and two inclined downwind towers with corresponding downwind rotors are also possible.
  • the distance between the towers may be shorter by the floating unit than by the rotor housings, as the towers are inclined outwards and away from each other. This enables a greater area to be covered than what the size of the platform should indicate.
  • the rotors can be placed further apart than if the towers had been vertical.
  • Each rotor defines a plane of revolution, perpendicular to each axis of revolution. These planes may be substantially parallel, as each rotor shall be driven by wind with substantially the same direction.
  • each rotor and the longitudinal central axis of each tower form an inclined angle in relation to each other such that the distance between each rotor blade and the tower is increasing with increasing distance from the housing or nacelle toward the tip of the rotor blade, even when the tower and the rotor blade is in the same plane.
  • each tower may be attached in the floating unit at a mutual distance such that each tower form a corner of a triangle, and such that the longitudinal axes of each tower extend inclined outwards from each corner of this triangle and such that each tower form an angle of between 10° and 40° in relation to a vertical direction.
  • it may well be more towers and rotors in a combination of upwind and downwind rotors that can collect an area depending on the size of the rotors and the number of rotors.
  • the angle of the towers may be substantially 20° in relation to a horizontal plane, but each tower may have a different angle, and the angle can be adjusted in relation to what is desirable in relation to the wind conditions and mechanical factors.
  • the downwind rotor/rotors can be placed higher than upwind rotor/rotors.
  • the floating unit may be designed as a triangle with each tower extending upwards from each corner of this triangle.
  • the floating unit may be a tubular structure.
  • the elements of the tubular structure may be circular, oval, be a rectangular hollow section or include any suitable cross section.
  • the floating unit could also be shaped for instance as a trapezoid with three rotors on the upwind side and two on the downwind side. This provides 66% more rotors on three times as big area, but the structure will become smaller due to fewer vertical elements.
  • the infrastructure in this case must be divided between five rotors instead of three.
  • the floating unit or platform may be ballastable.
  • the energy production of the rotors can be summed in a common unit on the floating unit and can be brought onshore with a common cable for transferring energy.
  • the energy may be generated in the nacelles by a generator, with or without brushes or transmission/gearing.
  • the energy may be transferred to the floating unit mechanically, and may drive a generator on the buoyant unit.
  • a common generator be driven by the various rotors.
  • the current from these be coordinated with suitable power electronics or in other ways. Equipment that handles this can easily be placed on the floating unit.
  • the floating unit may be moored through for instance a revolving cylinder or turret, well known within bunkring of oil to tankers etc., where a revolving cylinder goes into an adapted unit in a vessel.
  • a turret be used and may go into the floating unit, and may ensure that the floating unit may rotate in relation to wind, at the same time as it may provide for connection for bringing onshore energy and other connections for surveillance and control.
  • the mooring may be left where the apparatus is to be placed and may be anchored in a suitable buoy or the like when it not is in use such that the mooring easily can be found and used again. When using a turret, may this also be left when the apparatus must be removed in a common way.
  • connection easily can be made when the wind power apparatus has been brought on site for energy production.
  • the wind power apparatus may revolve in relation to the wind due to units that provides a weather vane effect, or can be provided by individual control of the wind turbines, either by individual control of each single turbine, or by individual control of each single rotor blade.
  • the control of the rotors in this connection would be control of the pitch of the rotor blades.
  • Individual control of rotor blades such that the rotor blades not have the same pitch through the entire revolution is known technology from several subject areas and may in this connection be used with advantage to achieve yaw of the entire apparatus, balance, improved efficiency etc.
  • the rotor blades may be designed such that they can be pitched to completely stop the rotors in the event of a breakdown, transport, maintenance, accidents or due to extreme weather conditions.
  • the control may receive information about wind conditions, waves, inclination, the placement of the wind power apparatus etc. from land and from sensors on the apparatus. Cameras can be placed on the apparatus for monitoring purposes.
  • the apparatus may also be equipped with a motor in the point of revolution and may be yawed against the wind by means of one or several sensors that control the motor.
  • the motor may be in connection with a gear rim that may revolve the apparatus, and may be controlled by sensors.
  • the floating unit must ensure sufficient stability and buoyancy for the entire structure both in anchored and in a non-anchored condition.
  • the floating unit may be a barge like structure, have a truss work or jacket-like structure or be made as some other semi submersible structure.
  • FIG. 1 shows an embodiment of a floating wind power apparatus according to the invention
  • FIG. 2 shows the embodiment shown on FIG. 1 from the side
  • FIG. 3 shows the embodiment of FIG. 1 from the front.
  • FIG. 1 it is shown a floating wind power apparatus according to the invention.
  • the apparatus includes a floating unit 5 and at least three rotors 1 , 4 supported in rotor housings 10 , placed on separate towers 2 , 3 .
  • the towers 2 , 3 have a longitudinal central axis and are attached in the floating unit 5 and the rotor housing 10 .
  • the floating unit 5 may yaw to direct the rotors 1 , 4 in relation to the wind.
  • the rotor 4 on FIG. 1 is a downwind rotor placed on tower 3 , and the two rotors 1 , placed on towers 2 are upwind rotors.
  • the upwind towers 2 are placed at an inclined angle ⁇ in relation to a horizontal direction and the downwind tower 3 , is placed at an inclined angle ⁇ in relation to a horizontal direction.
  • the distance a, b, c between the three towers 2 , 3 at the floating unit 5 is less than the distance A, B, C between the towers 2 , 3 at the rotor housing 10 , such that the towers 2 , 3 points away from each other.
  • the three rotors 1 , 4 revolve about substantially parallel axes of revolution.
  • the floating unit is designed as a triangle, and each tower 2 , 3 is attached to the floating unit 5 with a mutual distance a, b, c such that each tower 2 , 3 is attached in each corner 6 , 7 , 8 of the triangle.
  • the longitudinal axes of each tower 2 , 3 extend with an inclined angle outwards from each corner 6 , 7 , 8 of the triangle.
  • the floating unit 5 is a tubular structure with internal floating tanks and possibly ballasts tanks for stabilizing, adjustment of the placing of the apparatus in the water and for balancing.
  • the ballast tanks may be connected to suitable pumps and control systems (not shown).
  • the tubes of the structure may form a truss work structure common within the offshore area.
  • the ballasting may also be made dynamical such that the unit can be kept at a predetermined angle during various wind conditions.
  • a connection 9 is shown at the centre of the floating unit 5 for connection with a revolving cylinder or turret (not shown).
  • FIG. 2 is a side elevation of FIG. 1 , where the tower angles ⁇ , ⁇ are shown and where it is clearly shown how the towers 2 , 3 for the upwind rotors 1 and the downwind rotor 4 are directed away from each other, such that the towers 2 , 3 are inclined away from each other and such that the distance between the rotors is increased, and the disturbances of the wind are reduced. It is also clearly shown how each tower 2 , 3 is placed in the corners 6 , 7 of the floating unit 5 , and how the towers 2 , 3 extend between the rotor housing 10 and the floating unit 5 . From the figure it is also shown that the downwind tower 3 is taller than the upwind towers 2 .
  • the height of the towers 2 , 3 and the diameter of the rotors 1 , 4 are designed such that the unit is balanced in operation.
  • the placing of the attachment point 9 for the floating unit 5 is also shown.
  • the tower angle ⁇ that is shown on FIG. 2 shows that the tower is inclined forwards.
  • FIG. 2 does not show that the tower also is inclined to the side.
  • FIG. 3 it is shown how the upwind towers 2 are inclined outwards to the side, and that the downwind tower 3 is taller than upwind towers 2 , 3 . Furthermore it is shown how the area that is covered by the upwind rotors 1 to somewhat overlap the area that is covered by the downwind rotor 4 . The placement of the towers on the floating unit 5 is also shown.
  • the entire apparatus may of course be used backwards, such that the rotors that are described as upwind rotors become downwind rotors etc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sustainable Energy (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)
US12/743,307 2007-11-19 2008-11-19 Floating wind power apparatus Expired - Fee Related US8471399B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20075934 2007-11-19
NO20075934A NO327871B1 (no) 2007-11-19 2007-11-19 Flytende vindkraftanordning
PCT/NO2008/000412 WO2009067023A1 (en) 2007-11-19 2008-11-19 Floating wind power apparatus

Publications (2)

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US20110006539A1 US20110006539A1 (en) 2011-01-13
US8471399B2 true US8471399B2 (en) 2013-06-25

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US (1) US8471399B2 (no)
EP (1) EP2212553A1 (no)
NO (1) NO327871B1 (no)
WO (1) WO2009067023A1 (no)

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US20110241347A1 (en) * 2008-12-18 2011-10-06 Single Buoy Moorings Inc. Removable offshore wind turbines with pre-installed mooring system
US20120103244A1 (en) * 2010-10-28 2012-05-03 Jin Wang Truss Cable Semi-submersible Floater for Offshore Wind Turbines and Construction Methods
US20120256423A1 (en) * 2011-04-06 2012-10-11 Liu Kuo-Shen Device of floating wind turbine capable of counterbalancing torques therein
US20120269628A1 (en) * 2011-04-06 2012-10-25 Liu Kuo-Shen Device of Floating Wind Turbine Capable of Counterbalancing Torques Therein
US20140054895A1 (en) * 2010-12-13 2014-02-27 Dennis Patrick Steel Windtracker twin-turbine system
US20150211477A1 (en) * 2014-06-03 2015-07-30 Christopher Wright Offshore Floating Barge to Support Sustainable Power Generation
US9499241B2 (en) * 2013-06-27 2016-11-22 Alstom Renewable Technologies Floating offshore structures
US20170342957A1 (en) * 2014-07-02 2017-11-30 Energy Technologies Institute Llp Support structure for tidal energy converter system
US20190211804A1 (en) * 2016-06-03 2019-07-11 Aerodyn Consulting Singapore Pte Ltd Floating Wind Turbine Having a Plurality of Energy Conversion Units

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JP5764673B2 (ja) * 2012-08-10 2015-08-19 エムエイチアイ ヴェスタス オフショア ウィンド エー／エス 浮体式風車設備の部品搬送方法
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FR3086352B1 (fr) * 2018-09-20 2020-09-11 Eolink Eolienne flottante a position en lacet pilotable
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CN113915070A (zh) * 2021-10-18 2022-01-11 上海电气风电集团股份有限公司 一种梁型海上浮式风力涡轮发电系统
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US20110006539A1 (en) 2011-01-13
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WO2009067023A4 (en) 2009-07-30
WO2009067023A1 (en) 2009-05-28

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